What happen if unbalanced voltage was applied to the stator of the induction motor?

Asked by Last Modified  

7 Answers

Follow 0
Answer

Please enter your answer

Neha Mahajan

Maths, Science And Engineering Subjects

The effect of unbalanced voltages on polyphase induction motors is equivalent to the introduction of a "negative sequence voltage" having a rotation opposite to that occurring with balanced voltages. This negative sequence voltage produces in the air gap a flux rotating against the rotation of the rotor,...
read more
The effect of unbalanced voltages on polyphase induction motors is equivalent to the introduction of a "negative sequence voltage" having a rotation opposite to that occurring with balanced voltages. This negative sequence voltage produces in the air gap a flux rotating against the rotation of the rotor, tending to produce high currents. A small negative sequence voltage may produce in the windings currents considerably in excess of those present under balanced voltage conditions. The effect of unbalanced voltages on polyphase induction motors is equivalent to the introduction of a "negative sequence voltage" having a rotation opposite to that occurring with balanced voltages. This negative sequence voltage produces in the air gap a flux rotating against the rotation of the rotor, tending to produce high currents. A small negative sequence voltage may produce in the windings currents considerably in excess of those present under balanced voltage conditions. Temperature rise and load carrying capacity A relatively small unbalance in voltage will cause a considerable increase in temperature rise. In the phase with the highest current, the percentage increase in temperature rise will be approximately two times the square of the percentage voltage unbalance. The increase in losses and consequently, the increase in average heating of the whole winding will be slightly lower than the winding with the highest current. read less
Comments
Dislike Bookmark

I HAVE QUALIFIED THE GATE WITH 98 PERCENTILE WHICH IS MOST COMPETATIVE EXAMS IN ENGINEERING

Did u mean if the harmonics are there then it will produce the vibrations and noise.
Comments
Dislike Bookmark

Armature will not rotate
Comments
Dislike Bookmark

expert in B.TECH EEE subjects

Unbalanced flux will develop in the air-gap and the rotor undergoes vibrations.
Comments
Dislike Bookmark

tution teacher

Then the flux distribution is not same.
Comments
Dislike Bookmark

Engineering specialist

unbalanced voltage leads to negative sequence voltage and in turn negative sequence current which leads to a flux opposite to the normal one and in turn an emf in the rotor and this leads to negative sequence current which is very high and enough to burn rotor windings.
Comments
Dislike Bookmark

current will draw more in the circuit in which voltage is less and finally motor will get over heated and burnt or fuse will get blown off
Comments
Dislike Bookmark

View 5 more Answers

Related Questions

What should a person do if he /she is struggling in maths in class 9?
Start from the basics. Do more problems. if you know the basics & concepts, you can easily score good marks in exams.
Rahul
0 0
5
What can I do if my basic in class 9 and 10 are not cleared?
that all depends on your status of knowledge either you are intrested in self study so you can join some best books or coaching depend on yor intrest further you can contact me
Krity
0 0
5
What is the difference between a BTech in CSE and a BTech in CSE specializing in cloud computing?
it's actually BTech in CSE but if some university providing any technology based specialization then it's good. u can go for it as cloud is very high demanding technology and it will remain in future also.
Krishna
0 0
5
What is the better option for class 10, coaching class, self-study or private tuition?
If you are taking coaching classes you must need self-study. Even if you take private tuition you must need self - study. If you have self-study no need of coaching classes and private tuitions . ...
Neelima
0 0
5
Which is best book for maths in class 10?
ML Agarwal .. trust it.. Make sure you do all examples.
Sushil
0 0
9

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Computer Awareness
A Computer is an electronic device that can be instructed to carry out an arbitrary set of arithmetic or logical operations automatically. 1. Introduction: i. Speed: The speed of computation is very...
P

Parul S.

0 0
0
Semiconductor
Intrinsic Semiconductor :It is a pure Semiconductor which acts as an insulator at low temperature and acts as a Conductor at high temperature. Hence it is not used in developing electronic devices. Doping:...

Semalla Santosh Kumar

0 0
0
Understanding Big Omega (?), Big Theta (?), Small Oh (o) And Small Omega (?) Notations
How to describe Big Omega(Ω) ? If run time of an algorithm is of Ω(g(n)), it means that the running time of the algorithm (as n gets larger) is at least proportional to g(n). Hence it helps...

Shiladitya Munshi

0 0
0
Admixtures properties
Concrete Admixtures – Types, Selection, Properties and Applications Concrete admixtures are used to enhance the properties of concrete for applications in concrete...
T

Thati Anil Kumar

0 0
0
How To Overcome Exam Pressure?
Exam pressure is something that everyone faces atleast once in their lifetime. It is a psychological fact that generates a fear in us at the time of any exam or any other opportunity. Most of us finds...
A

Ankit Khurana

0 0
0

Recommended Articles

Finding Tuitions for Bachelor of Engineering...

According to a recent survey conducted by the NCAER (National Council of Advanced Economic Research), engineering is the most sought after course in India. Some engineering courses are offered as BE or Bachelor of Engineering while some as Bachelor in Technology or B.Tech. Since engineering is a professional course, the...

Read full article >

Tuitions for Professional courses - Does...

MBA, Medicine and engineering are the three main professional courses in India. Engineering is still one of the highly sorted after professional courses in the under graduate level, while MBA is favoured as a preferred post graduate course. To shine in these courses, one needs to work and study hard. Engineering as a...

Read full article >

6 Healthy Habits of School Children

While schools provide formal education to the children, the home is where they start learning about things informally. Parents think that schools will take the initiative to educate their children. Well, this is partially true, as parents also play an essential role in bringing up their child. For the development of particular...

Read full article >

The Rising Problems in Indian Government School

With the mushrooming of international and private schools, it may seem that the education system of India is healthy. In reality, only 29% of children are sent to the private schools, while the remaining head for government or state funded education. So, to check the reality of Indian education system it is better to look...

Read full article >

Find B.E. Tuition near you
B.E. Tuition in Hyderabad
B.E. Tuition in Bangalore
B.E. Tuition in Delhi
B.E. Tuition in Chennai
B.E. Tuition in Mumbai
B.E. Tuition in Pune
B.E. Tuition in Kolkata
B.E. Tuition in Noida
B.E. Tuition in Gurgaon
B.E. Tuition in Ghaziabad
Online Btech Tuitions

Looking for BTech Tuition ?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you